The destruction of this body part's namesake perox
The destruction of this body part's namesake peroxidase by antibodies may be a cause of Hashimoto's Disease. This structure produces namesake hormones that are tyrosine derivatives. Those hormones are overproduced when this producer of calcitonin is afflicted with Graves' Disease. A lack of iodine may cause a swelling of it called a goiter. For 10 points, name this endocrine gland found in the neck.
The destruction of this body part's namesake peroxidase by antibodies may be a cause of Hashimoto's Disease.
{thyroid} gland